Electronic Theses and Dissertation

Persaingan antara gulma dan tanaman kedelai dapat menghambat pertumbuhan tanaman dan berdampak pada penurunan hasil panen. Penelitian ini bertujuan untuk mengetahui pengaruh beberapa metode pengendalian gulma terhadap hasil tanaman kedelai. Penelitian ini telah dilaksanakan di Kebun Percobaan 1 Fakultas Pertanian Universitas Syiah Kuala dengan ketinggian 5 meter diatas permukaan laut (mdpl) dan Laboratorium Pengelolaan Gulma, Departemen Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala, Banda Aceh. Penelitian telah dilaksanakan pada Desember 2024 sampai dengan Juni 2025 dengan menggunakan Rancangan Acak Kelompok (RAK) non-faktorial yang terdiri atas tujuh perlakuan dan tiga ulangan. Perlakuan yang diuji meliputi: tanpa penyiangan gulma, bebas gulma (penyiangan setiap 3 hari sekali), penyiangan gulma pada 21 dan 42 HST, herbisida metribuzin dengan dosis 1 kg b.a. ha-1, herbisida pendimethalin dengan dosis 1 kg b.a. ha-1, mulsa eceng gondok 20 ton ha-1, mulsa jerami padi 20 ton ha-1. Peubah yang diamati meliputi jumlah polong per tanaman, jumlah biji per tanaman, bobot biji per tanaman, bobot 100 butir dan hasil biji kering. Hasil penelitian menunjukkan bahwa aplikasi beberapa metode pengendalian gulma berpengaruh nyata terhadap peningkatan jumlah polong per tanaman dan bobot biji per tanaman. Mulsa eceng gondok 20 ton ha-1 dan herbisida pendimethalin 1 kg b.a ha-1 mampu meningkatkan jumlah polong dan bobot biji per tanaman.

Competition between weeds and soybean plants can inhibit plant growth and reduce crop yields. This reserch aims to determine the effect of several weed control methods on soybean yields. This reserch was conducted at Experimental Garden 1, Faculty of Agriculture, Syiah Kuala University, at an altitude of 5 meters above sea level (masl) and the Weed Management Laboratory, Department of Agrotechnology, Faculty of Agriculture, Syiah Kuala University, Banda Aceh. The reserch was conducted from December 2024 to June 2025 using a non-factorial randomized block design consisting of seven treatments and three replicates. The treatments tested included: no weed control, weed-free (weeding every 3 days), weed control at 21 and 42 days after sowing (DAS), metribuzin herbicide at a dose of 1 kg a.i. ha-1, pendimethalin herbicide at a dose of 1 kg a.i. ha-1, water hyacinth mulch at 20 tons ha-1, and rice straw mulch at 20 tons ha-1. The variables observed included the number of pods per plant, the number of seeds per plant, the weight of seeds per plant, the weight of 100 seeds, and the dry seed yield. The results showed that the application of several weed control methods had a significant effect on increasing the number of pods per plant and seed weight per plant. Water hyacinth mulch at 20 tons ha-1 and pendimethalin herbicide at 1 kg a.i. ha-1 were able to increase the number of pods and seed weight per plant.